Weather Alerts for California
1. Air Quality Alert for: Coachella Valley; San Gorgonio Pass Near Banning
2. Freeze Watch for: Western Siskiyou County; Central Siskiyou County
3. High Wind Warning for: Eastern Sierra Slopes of Inyo County; Owens Valley; White Mountains of Inyo County; Death Valley National Park; Esmeralda and Central Nye County
4. Wind Advisory for: Chuckwalla Mountains; Imperial County Southeast
5. Wind Advisory for: Imperial County Southwest
6. Wind Advisory for: Joshua Tree NP West
7. Wind Advisory for: Morongo Basin
8. Wind Advisory for: Salton Sea; Imperial County West; Imperial Valley
9. Wind Advisory for: Surprise Valley California; Northern Washoe County
10. Winter Storm Warning for: Greater Lake Tahoe Area; Mono; Greater Lake Tahoe Area
11. Winter Storm Warning for: Kaiser to Rodgers Ridge; Kings Canyon NP; Grant Grove Area; Sequoia NP
12. Winter Storm Warning for: Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada
13. Winter Storm Warning for: Yosemite NP outside of the valley; Upper San Joaquin River
14. Winter Weather Advisory for: Del Norte Interior; Northern Humboldt Interior; Southern Humboldt Interior; Northern Trinity; Southern Trinity; Northeastern Mendocino Interior
15. Winter Weather Advisory for: Lassen-Eastern Plumas-Eastern Sierra Counties
16. Winter Weather Advisory for: Western Siskiyou County
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Current U.S. National Radar--Current
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National Weather Forecast--Current
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National Weather Forecast for Tomorrow
Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.
North America Water Vapor (Moisture)
This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds); brown indicates very little moisture present; black indicates no moisture.
Weather Topic: What are Nimbostratus Clouds?
Home - Education - Cloud Types - Nimbostratus Clouds
Next Topic: Precipitation
A nimbostratus cloud is similar to a stratus cloud in its formless,
smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud,
because it is thicker.
Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat
of moderate to heavy precipitation. In some cases, the precipitation may evaporate
before reaching the ground, a phenomenon known as virga.
Next Topic: Precipitation
Weather Topic: What is Rain?
Home - Education - Precipitation - Rain
Next Topic: Shelf Clouds
Precipitation in the form of water droplets is called rain.
Rain generally has a tendency to fall with less intensity over a greater period
of time, and when rainfall is more severe it is usually less sustained.
Rain is the most common form of precipitation and happens with greater frequency
depending on the season and regional influences. Cities have been shown to have
an observable effect on rainfall, due to an effect called the urban heat island.
Compared to upwind, monthly rainfall between twenty and forty miles downwind of
cities is 30% greater.
Next Topic: Shelf Clouds